Fenton air purification system

Abstract

The invention provides a Fenton air purification system, which comprises a shell, a reaction tank, a first light source, a storage tank and a ventilation device; wherein the shell surrounds the reaction tank, the first light source and the ventilation device, and the shell has an inlet hole and an outlet hole; the reaction tank accommodates an iron reactant solid; the first light source illuminates the iron reactant solid, and the first light source provides ultraviolet light C; and the storage tank connects to the reaction tank and accommodates a hydrogen peroxide solution, which is supplied to the reaction tank. The invention utilizes the Fenton reaction to produce hydroxyl radicals, which are released into the air and can be harnessed to remove harmful substances such as volatile organic compounds in the air through hydroxyl radical- mediated oxidation reactions.

Description

Technical Field

[0001] This invention relates to a Fenton air purification system, particularly utilizing the Fenton reaction to generate hydroxyl radicals and release them into the air, thereby removing harmful substances such as volatile organic compounds from the air through the high oxidizing power of the hydroxyl radicals. Prior Technology

[0002] Volatile organic compounds (VOCs) are organic compounds that readily evaporate or exist in a gaseous state at room temperature and pressure. Common VOCs include formaldehyde, benzene, toluene, xylene, acetone, methanol, ethanol, diethyl ether, dichloromethane, methane, butadiene, ethylene glycol, and diethylene glycol. Outdoor sources include exhaust gases from industrial and transportation vehicles, while indoor sources include cooking fumes, cleaning agents, pesticides, paints, coatings, and adhesives.

[0003] Given that VOCs can damage the nervous system, brain, liver, and kidneys, and cause problems such as nausea, headaches, weakness in the limbs, and memory loss, and that some VOCs are even carcinogenic, how to effectively remove VOCs is an important issue.

[0004] Traditionally, industrial VOC removal methods involve combustion. However, the cost of operating combustion furnaces for extended periods is high, and they are difficult to popularize in the work and home environments where most people spend a lot of time. Therefore, there is an urgent need to develop VOC removal methods that better meet the needs. Summary of the Invention

[0005] To address the above problems, this invention provides a Fenton air purification system, comprising: a housing, a reaction tank, a first light source, a storage tank, and a first ventilation device; wherein, The housing surrounds the reaction tank, the first light source, and the first ventilation device; The housing has an air inlet and an air outlet, the air inlet and the air outlet are in gas communication with each other, and the first ventilation device is adjacent to the air inlet or the air outlet; The reaction tank contains a solid iron reactant. The first light source irradiates the iron reactant solid, and the first light source provides ultraviolet light C; and The storage tank is connected to the reaction tank, and the storage tank contains a hydrogen peroxide solution to supply it to the reaction tank.

[0006] The Fenton reaction is Fe²⁺ + H₂O₂ → Fe³⁺·OH⁻ + OH⁻ (k = 76 M⁻¹S⁻¹). This invention is the first to demonstrate that the hydroxyl radicals generated by the Fenton reaction can escape from the hydrogen peroxide solution and be released into the air. Through a first ventilation device, the hydroxyl radicals pass through multiple pores in the shell and are dispersed into the external environment. The high oxidizing power of the hydroxyl radicals then removes volatile organic compounds (VOCs) and other harmful substances from the air. Secondly, the Fenton-like reaction is Fe³⁺ + H₂O₂ → Fe²⁺·OOH + H⁺ (k = 0.01 M⁻¹S⁻¹), but its reaction rate is significantly lower than that of the Fenton reaction. Therefore, this invention incorporates a first light source, using ultraviolet C light to irradiate the hydrogen peroxide solution and the iron reactant solid to increase the reaction rate of the Fenton-like reaction, ensuring the Fe²⁺ / Fe³⁺ cycle and thus significantly reducing the frequency of replacing the iron reactant solid. Hydrogen peroxide solution is a consumable; therefore, a storage tank is provided and connected to the reaction tank to supply the hydrogen peroxide solution to the reaction tank, preventing interruption of the Fenton reaction. In other words, the Fenton air purification system of this invention can continuously generate hydroxyl radicals 24 hours a day to effectively remove VOCs, and is suitable for factory working environments or general work and home environments.

[0007] In one embodiment, the housing also surrounds the storage tank. Preferably, the storage tank is adjacent to the bottom of the housing. More preferably, the storage tank is located below the reaction tank.

[0008] In one embodiment, the storage tank is located outside the housing and is connected to the reaction tank through a pipe passing through the housing.

[0009] In one embodiment, the first light source is a light-emitting diode.

[0010] In one embodiment, the wavelength of the ultraviolet C light is from 200 nm to 280 nm, for example: 200 nm, 240 nm, 260 nm, or 280 nm. Preferably, the wavelength of the ultraviolet C light is from 240 nm to 270 nm. More preferably, the wavelength of the ultraviolet C light is from 250 nm to 258 nm. Even more preferably, the wavelength of the ultraviolet C light is 254 nm. According to the present invention, ultraviolet C light has the effect of accelerating the Fenton-like reaction rate. Furthermore, according to the present invention, ultraviolet C light with wavelengths below 180 nm has the problem of ozone generation; therefore, ultraviolet C light in the wavelength range of the present invention will not promote the generation of harmful derivatives such as ozone.

[0011] In one embodiment, the first light source is positioned above or inside the reaction tank. Preferably, the first light source is housed in a transparent shell. More preferably, the first light source housed in the transparent shell is positioned above and adjacent to the surface of the hydrogen peroxide solution, or the first light source housed in the transparent shell is positioned between the surface of the hydrogen peroxide solution and the iron reactant solid.

[0012] The transparent shell helps to isolate hydroxyl radicals, volatilized hydrogen peroxide gas, and hydrogen peroxide solution. Furthermore, shortening the distance between the first light source and the iron reactant solid can increase the Fenton-like reaction rate, ensuring the Fe²⁺ / Fe³⁺ cycle.

[0013] In one embodiment, the storage tank is in fluid communication with the reaction tank.

[0014] In one embodiment, a first liquid level sensor is connected to the reaction tank to sense a low liquid level in the reaction tank, wherein the low liquid level is the level at which hydrogen peroxide solution needs to be replenished. That is, when the liquid level of the hydrogen peroxide solution in the reaction tank is at the low liquid level, the first liquid level sensor sends a signal to initiate the replenishment of hydrogen peroxide solution to ensure that the reaction tank always maintains sufficient hydrogen peroxide solution.

[0015] In one embodiment, a second liquid level sensor is connected to the reaction tank to sense a high liquid level in the reaction tank, and the high liquid level is the liquid level at which the replenishment of hydrogen peroxide solution is stopped. That is, when the liquid level of the hydrogen peroxide solution in the reaction tank is at the high liquid level, the second liquid level sensor sends a signal to stop the replenishment of hydrogen peroxide solution.

[0016] In one embodiment, either or both of the first and second level sensors are non-contact sensors. Preferably, the non-contact sensor comprises an infrared level sensor. In other words, either or both of the first and second level sensors do not need to come into contact with the hydrogen peroxide solution, thereby avoiding the shortening of their service life due to the effects of hydrogen peroxide.

[0017] In one embodiment, either or a combination of the first and second level sensors is connected to a pump. Preferably, either or a combination of the first and second level sensors is connected to a control element, and the control element is connected to a pump. More preferably, the pump comprises a peristaltic pump.

[0018] In one embodiment, the pump connects the reaction tank and the storage tank to deliver hydrogen peroxide solution from the storage tank to the reaction tank.

[0019] In one embodiment, the iron reactant solid comprises a plurality of beads. Preferably, the plurality of beads are a plurality of iron beads.

[0020] In one embodiment, the iron reactant solid is in direct contact with the bottom of the reaction tank or is spaced apart from the bottom of the reaction tank.

[0021] In one embodiment, the plurality of beads are dispersed across a plurality of planes, and the plurality of planes contain a plurality of perforations. Preferably, the plurality of planes are spaced apart from each other along the direction of gravity. More preferably, the beads on different planes are spaced apart from each other.

[0022] For example, the plurality of planes is the inner bottom surface of a basket, and the reaction tank is provided with stacked baskets, each basket having a plurality of perforations; wherein, each basket is covered with a single layer of beads. Preferably, a single bead corresponds to any one of the plurality of perforations on the inner bottom surface of the basket, placed in a one-to-one manner, and the inner bottom surface of the basket has a mesh or lattice structure.

[0023] Preferably, the diameter of the perforation is smaller than the average diameter of the plurality of beads. Preferably, the ratio of the diameter of the perforation to the average diameter of the plurality of beads is 0.4 to 0.6:1. Preferably, the ratio of the diameter of the perforation to the average diameter of the plurality of beads is 0.5:1.

[0024] According to the present invention, the iron reactant solids are arranged in a layered and spaced manner, which can effectively improve the Fenton reaction rate.

[0025] In one embodiment, the basket is a mesh basket. Preferably, the basket is a flat-bottomed mesh basket. More preferably, the bottom of the basket is provided with a support.

[0026] In one embodiment, the basket is connected to the reaction tank. Preferably, the basket is detachably connected to the reaction tank. More preferably, the basket is suspended or engaged with the reaction tank, for example: the basket is provided with a hook, and the hook is detachably fixed to the tank wall; or the basket is provided with a telescopic engaging structure, and the telescopic engaging structure is detachably fixed to the tank wall.

[0027] In one embodiment, the basket is connected to a lifting device. The present invention uses the lifting device to adjust the height of the basket in the reaction tank, thereby adjusting the distance between the iron reactant solid and the first light source, and thus adjusting the rate of the Fenton reaction.

[0028] In one embodiment, the iron reactant solid is a single block. Preferably, the iron reactant solid is a single iron block.

[0029] The iron reactant solid is vertically movable and connected to the reaction tank. Preferably, the single block is connected to the reaction tank via a lifting device. This invention improves the Fenton-like reaction rate by bringing the iron reactant solid closer to the light source.

[0030] In one embodiment, the iron reactant solid comprises any or a combination of pure ferrous iron, low-carbon steel, zero-valent iron, and magnetite (Fe3O4). Preferably, the iron reactant solid is pure ferrous iron. Pure ferrous iron refers to high-purity ferrous iron.

[0031] In one embodiment, the iron reactant solid comprises iron beads or iron blocks after rust removal. The rust is reddish-brown. Preferably, the iron beads or iron blocks after rust removal are black or dark bluish-gray.

[0032] In one embodiment, based on the total surface area of ​​a single iron bead or block after rust removal, the reddish-brown surface area is less than 1%. Preferably, based on the total surface area of ​​a single iron bead or block after rust removal, the reddish-brown surface area is less than 0.1%.

[0033] In one embodiment, the housing has an inner wall surface and an outer wall surface facing each other, and the inner wall surface faces the reaction tank; and the reaction tank has an inner tank wall surface and an outer peripheral wall surface facing each other; wherein, either or a combination of the inner wall surface of the housing and the outer peripheral wall surface of the reaction tank is provided with a photocatalytic coating, and either or a combination of the inner wall surface of the housing and the outer peripheral wall surface of the reaction tank is provided with a second light source, and the second light source provides ultraviolet light C.

[0034] Preferably, the photocatalytic coating material is selected from the group consisting of titanium dioxide (TiO2), zinc oxide (ZnO), tungsten trioxide (WO3), bismuth vanadium oxide (BiVO4), graphitic carbon nitride (g-C3N4), and cadmium sulfide (CdS). More preferably, the photocatalytic coating is a titanium dioxide coating.

[0035] In one embodiment, the photocatalytic coating is a nano-coating, that is, the material of the photocatalytic coating is nano-sized particles.

[0036] In one embodiment, the second light source is a light-emitting diode (LED). Preferably, the wavelength of the second light source is the same as that of the first light source. According to the present invention, ultraviolet light C in the wavelength range can effectively improve the hydrogen peroxide removal rate.

[0037] The present invention can effectively remove hydrogen peroxide that escapes from the reaction tank and / or the storage tank by irradiating the photocatalytic coating with ultraviolet C light, so as to prevent hydrogen peroxide from entering the external environment.

[0038] In one embodiment, the space surrounded by the shell has an airflow direction, which is either toward the direction of gravity, toward the opposite direction of gravity, or toward the direction perpendicular to gravity.

[0039] In one embodiment, the inlet or outlet surrounds either or a combination of the reaction tank and the storage tank. Preferably, the outlet surrounds the storage tank, further reducing the risk of hydrogen peroxide emission into the external environment by being further away from the reaction tank.

[0040] In one embodiment, the airflow direction is towards the direction of gravity. Specifically, the air inlet is located at the top of the housing, and the first ventilation device, the first light source, the reaction tank, and the storage tank are arranged sequentially in the direction of gravity, with the air outlet surrounding the storage tank.

[0041] In one embodiment, the airflow direction is opposite to the direction of gravity. Specifically, the air outlet is located at the top of the housing, and the first ventilation device, the first light source, the reaction tank, and the storage tank are arranged sequentially in the direction of gravity, with the air inlet surrounding the storage tank.

[0042] In one embodiment, the airflow direction is perpendicular to gravity. Specifically, the air inlet, the reaction tank, and the air outlet are sequentially arranged along a horizontal direction perpendicular to gravity. Preferably, the housing tapers towards the air inlet and the air outlet, respectively.

[0043] In one embodiment, the Fenton air purification system of the present invention further includes a second ventilation device, and the reaction tank is located between the first ventilation device and the second ventilation device. Preferably, the second ventilation device includes a fan. More preferably, the first ventilation device is adjacent to the air inlet, and the second ventilation device is adjacent to the air outlet. The present invention, by providing the first and second ventilation devices, can effectively guide airflow into and out of the Fenton air purification system, thereby improving the efficiency of hydroxyl radicals in the reaction tank being released into the air. Furthermore, when the Fenton air purification system is used in large spaces such as factories, the addition of the second ventilation device is particularly important, as this can effectively improve and maintain the removal rate of harmful substances such as volatile organic compounds.

[0044] In one embodiment, the Fenton air purification system of the present invention further includes an air supply device connected to the reaction tank. Preferably, one sidewall of the reaction tank protrudes to form a buffer space. More preferably, the air outlet of the air supply device is connected to the top of the reaction tank, and the air outlet of the air supply device faces the buffer space. The air supply device provided by the present invention can effectively improve the efficiency of the dissipation of hydroxyl radicals from the reaction tank into the air. Furthermore, when the Fenton air purification system is used in large spaces such as factories, the addition of the air supply device is particularly important to effectively improve and maintain the removal rate of harmful substances such as volatile organic compounds. The sidewall of the reaction tank is a wall located between the inner tank wall and the outer peripheral wall. Preferably, the sidewall of the reaction tank protrudes partially. More preferably, after the sidewall of the reaction tank protrudes, the outline area of ​​the top of the reaction tank is larger than the outline area of ​​the bottom of the reaction tank. In other words, the sidewall of the reaction tank does not protrude outwards along its entire surface, but rather only partially protrudes outwards from the sidewall near the top of the reaction tank.

[0045] In one embodiment, the air supply device includes a blower.

[0046] In one embodiment, the Fenton air purification system of the present invention further includes either or a combination of a cooling device and a heating device, wherein either or the combination of the cooling device and the heating device is connected to the reaction tank. The cooling device can lower the temperature of the hydrogen peroxide solution in the reaction tank to stop the Fenton reaction. The heating device can raise the temperature of the hydrogen peroxide solution in the reaction tank to enhance the Fenton reaction. The present invention can effectively control the generation efficiency of hydroxyl radicals through the cooling device and the heating device.

[0047] In one embodiment, the cooling device includes a cooler, and / or the heating device includes a heater. Preferably, the heating temperature of the heating device is set to be above room temperature up to 65°C, for example: 15°C, 20°C, 25°C, 30°C, 35°C, 40°C, 45°C, 50°C, 55°C, 60°C, or 65°C. This invention can generate hydroxyl radicals at room temperature, and the temperature can also be appropriately increased to enhance the Fenton reaction rate.

[0048] In one embodiment, the top of the reaction tank is provided with a vent and a switching mechanism, and the switching mechanism is movably open or close the vent. When the Fenton air purification system of the present invention is turned off, the switching mechanism will close the vent, for example, by covering or sealing the vent with a cover to prevent hydrogen peroxide gas from evaporating into the air. Preferably, the vent faces the vent pipe.

[0049] In one embodiment, the Fenton air purification system of the present invention further includes an exhaust channel, which is in gas communication with the second ventilation device; wherein the exhaust channel is provided with a photocatalytic coating and a third light source, and the third light source provides ultraviolet C light to irradiate the photocatalytic coating. Preferably, the exhaust channel is curved, for example, spiral. The present invention can significantly increase the generation of hydroxyl radicals by increasing the amount of iron reactant solids and the reaction area, as well as increasing the hydrogen peroxide concentration and reaction temperature of the hydrogen peroxide solution. At this time, the hydrogen peroxide gas volatilized can be removed in the exhaust channel, and the non-linear exhaust channel can increase the length of the exhaust channel in a limited space, thereby improving the removal efficiency of hydrogen peroxide gas.

[0050] In one embodiment, the Fenton air purification system of the present invention further includes a chimney, and the chimney is in gas communication with the exhaust channel. The Fenton air purification system of the present invention can purify or treat factory exhaust gas and release the purified or treated gas into outdoor air through the chimney.

[0051] In one embodiment, the third light source is a light-emitting diode (LED). Preferably, the wavelength of the third light source is the same as that of the first light source.

[0052] In one embodiment, the reaction tank is a single reaction tank or a plurality of reaction tanks. Preferably, each of the plurality of reaction tanks is provided with the first light source in a one-to-one manner, or each of the plurality of reaction tanks is provided with a plurality of the first light sources in a one-to-many manner.

[0053] In one embodiment, the reaction tank contains a plurality of baskets, and the plurality of baskets are arranged horizontally in a direction perpendicular to gravity.

[0054] In one embodiment, the reaction tank comprises a plurality of reaction tanks, and the plurality of reaction tanks are arranged in layers along the direction toward gravity.

[0055] In one embodiment, the reaction tank contains a plurality of baskets, and the plurality of baskets are arranged horizontally in a direction perpendicular to gravity, and the reaction tank comprises a plurality of reaction tanks, and the plurality of reaction tanks are arranged in layers in a direction toward gravity.

[0056] According to the present invention, increasing the number of reaction tanks and the number of first light sources can increase the production of hydroxyl radicals and thus increase the ability to remove VOCs.

[0057] In one embodiment, the housing is provided with a door, and either or a combination of the reaction tank and the storage tank is slidably connected to the housing; wherein, when the door is open, either or a combination of the reaction tank and the storage tank can pass through the door. This invention improves the convenience of maintaining the Fenton air purification system and replenishing hydrogen peroxide solution to the storage tank.

[0058] Preferably, the housing is provided with a plurality of slide rails, and either or a combination of the reaction tank and the storage tank is provided with a plurality of pulleys, and the plurality of pulleys are in direct contact with the plurality of slide rails.

[0059] In one embodiment, any one or a combination of the housing, the reaction tank, and the storage tank is made of stainless steel or plastic.

[0060] In one embodiment, the first ventilation device is a fan. Preferably, the first ventilation device connects the fan to the housing via a horizontal or vertical bar.

[0061] The present invention uses the horizontal bar or the vertical bar to effectively avoid obstruction of airflow inside the housing.

[0062] In one embodiment, the Fenton air purification system further includes a vent pipe, the top of the reaction tank having an opening facing the vent pipe, and the vent pipe extending toward the first ventilation device. Preferably, the vent pipe is located between the air inlet or outlet of the housing and the reaction tank.

[0063] In one embodiment, the vent pipe has a plurality of openings in its wall. Preferably, the cross-sectional area of ​​the vent pipe gradually increases in the direction toward the first ventilation device, that is, the cross-sectional areas at both ends of the vent pipe are different, and the cross-sectional area at the end adjacent to the reaction tank is smaller, so as to improve the ventilation efficiency.

[0064] In one embodiment, the vent pipe is in direct contact with the top of the reaction tank.

[0065] In one embodiment, the Fenton air purification system includes the hydrogen peroxide solution. Preferably, the hydrogen peroxide solution includes water and hydrogen peroxide. More preferably, the hydrogen peroxide solution includes water, hydrogen peroxide, and phosphoric acid.

[0066] In one embodiment, the pH of the hydrogen peroxide solution is between 2 and 4. Preferably, the pH of the hydrogen peroxide solution is between 2.5 and 3.5.

[0067] In one embodiment, the concentration of hydrogen peroxide is from 20 w / v% to 80 w / v, based on the total volume of the hydrogen peroxide solution. Preferably, the concentration of hydrogen peroxide is from 25 w / v% to 55 w / v.

[0068] In one embodiment, the concentration of hydrogen peroxide in the reaction tank is 25 w / v% to 35 w / v%. Preferably, the concentration of hydrogen peroxide in the reaction tank is 30 w / v.

[0069] In one embodiment, the concentration of hydrogen peroxide solution in the storage tank is greater than the concentration of hydrogen peroxide solution in the reaction tank. Preferably, the concentration of hydrogen peroxide in the storage tank is 45 w / v% to 55 w / v%. More preferably, the concentration of hydrogen peroxide in the storage tank is 50 w / v.

[0070] In one embodiment, the hydrogen peroxide solution further comprises phosphoric acid to maintain a pH value. Preferably, the concentration of phosphoric acid is from 0.05 w / v% to 0.5 w / v% based on the total volume of the hydrogen peroxide solution. More preferably, the concentration of phosphoric acid is from 0.08 w / v% to 0.15 w / v%. Even more preferably, the concentration of phosphoric acid is 0.1 w / v.

[0071] In one embodiment, the present invention is applicable to the automotive manufacturing industry, petrochemical industry, electronics industry (e.g., semiconductor industry, gravure printing), dry cleaning industry, plastic processing industry (e.g., PU synthetic leather), surface coating industry, office buildings, apartments, schools, medical institutions (including operating rooms and nurseries), tunnels, subway stations, and animal husbandry, etc.

[0072] In summary, the Fenton air purification system of this invention utilizes the Fenton reaction to generate and release hydroxyl radicals into the air, and removes volatile organic compounds and other harmful substances from the air through the high oxidizing power of the hydroxyl radicals. Furthermore, this invention eliminates the need for combustion, thus avoiding the high costs of operating a combustion furnace for extended periods and improving safety, making it suitable for factory work environments as well as general work and home environments. Finally, the Fenton air purification system of this invention also has advantages such as energy saving, low cost, easy capacity expansion, low noise, easy maintenance, and no adverse byproducts. Simple Explanation of the Diagram

[0073] Figure 1 is a schematic diagram of the structure of Embodiment 1-1 of the present invention. Figure 2 is a perspective view of the appearance of Embodiment 1-1 of the present invention. Figure 3 is a top view of Embodiment 1-1 of the present invention. Figure 4 is a perspective view of the finished product of Embodiments 1-2 of the present invention. Figure 5 shows a photograph of the appearance of iron beads as a solid reactant of iron. Figure 6 is a schematic diagram of the structure of embodiments 1-3 of the present invention. Figure 7 is a schematic diagram of the structure of Embodiment 2 of the present invention. Figure 8 is a perspective view of the appearance of Embodiment 2 of the present invention. Figure 9 is a cross-sectional view of Embodiment 3-1 of the present invention in the vertical direction. Figure 10 is a horizontal cross-sectional view of Embodiment 3-1 of the present invention. Figure 11 is a cross-sectional view in the vertical direction of Embodiment 3-2 of the present invention. Figure 12 is a horizontal cross-sectional view of Embodiment 3-2 of the present invention. Figure 13 is a cross-sectional view of the exhaust channel in the vertical direction of Embodiment 3-3 of the present invention. Figure 14 shows the electron spin resonance spectral signals of DMPO-OH obtained at different time points in Test Example 1 of the present invention. Figure 15 shows the changes in DMPO-OH concentration at different time points in Test Example 1 of the present invention. Figure 16 shows the TEMPOL electron spin resonance spectrum obtained in Test Example 2 of the present invention. Implementation

[0074] The following provides several embodiments to illustrate the implementation of the present invention; those skilled in the art can easily understand the advantages and effects of the present invention through the contents of this specification, and can make various modifications and changes without departing from the spirit of the present invention to implement or apply the contents of the present invention.

[0075] Example 1-1: Fenton Air Purification System 1A

[0076] As shown in Figure 1, the Fenton air purification system 1A of the present invention comprises: a housing 10, a reaction tank 11, a first light source 12, a storage tank 13, and a first ventilation device 14; wherein, the housing 10 surrounds the reaction tank 11, the first light source 12, the storage tank 13, and the first ventilation device 14, and the housing 10 has an air inlet 101 and an air outlet 102, the air inlet 101 and the air outlet 102 being in gas communication with each other, and the first ventilation device 14 being adjacent to the air inlet 101; the reaction tank 11 contains an iron reactant solid 2; the first light source 12 irradiates the iron reactant solid 2, and the first light source 12 provides ultraviolet light C; and the storage tank 13 is connected to the reaction tank 11, and the storage tank 13 contains a hydrogen peroxide solution to supply the hydrogen peroxide solution to the reaction tank 11. The Fenton air purification system 1A operates at room temperature.

[0077] Second, the first ventilation device 14 includes a fan. The top 110 of the reaction tank 11 is an opening, and the top 110 is further provided with a ventilation pipe 111. The ventilation pipe 111 extends around the opening and toward the first ventilation device 14, and the cross-sectional area of ​​the ventilation pipe 111 gradually increases toward the first ventilation device 14. The pipe wall of the ventilation pipe 111 includes a plurality of openings 1110, and there is an airflow direction F in the space surrounded by the housing 10, and the airflow direction F is toward the direction of gravity. In addition, the plurality of openings 1110 allow airflow to pass through, which is beneficial for the dispersion of hydroxyl radicals.

[0078] Third, the first light source 12 is a light-emitting diode (LED) and provides ultraviolet (UV) light C with a wavelength of 254 nanometers. The housing 10 has an inner wall surface 103 and an outer wall surface 104 facing each other. The inner wall surface 103 faces the reaction tank 11, and the material of the inner wall surface 103 is sandblasted stainless steel, which facilitates the application of a titanium dioxide coating 1030. The outer peripheral wall surface 112 of the reaction tank 11 is also provided with a titanium dioxide coating 1030, and the outer peripheral wall surface 112 of the reaction tank 11 is further provided with a second light source 15, which also provides ultraviolet (UV) light C with a wavelength of 254 nanometers. The hydrogen peroxide emitted from the reaction tank 11 through the plurality of openings 1110 is removed by the photoreaction between the ultraviolet (UV) light C and the titanium dioxide coating 1030.

[0079] As shown in Figure 2, the top of the housing 10 has a mesh structure, and the air inlet 101 is located at the top of the housing 10 and surrounds the side of the top of the housing 10. The air outlet 102 surrounds the storage tank (not shown).

[0080] As shown in Figure 3, the first ventilation device 14 (i.e., fan) is fixed to a crossbar 140, and the crossbar 140 is connected to the diagonal of the housing 10 for fixation, that is, the first ventilation device 14 is fixed to the housing 10 by means of the crossbar 140.

[0081] Examples 1-2: Fenton Air Purification System 1B

[0082] Figure 4 shows that the housing 10 is provided with a door 105. When the door 105 is open, the reaction tank (not shown) and / or the storage tank (not shown) can pass through the door 105 to improve the convenience of maintaining the Fenton air purification system 1B and replenishing hydrogen peroxide solution to the storage tank.

[0083] As shown in Figure 5, the iron reactant solid is iron beads after rust has been removed. It is black and reddish-brown without rust, with a diameter of 2 cm and a weight of about 33 grams per bead.

[0084] Examples 1-3: Fenton Air Purification System 1C

[0085] The Fenton Air Purification System 1C enhances ventilation capacity to suit large spaces such as factories. As shown in Figure 6, firstly, the Fenton Air Purification System 1C further includes a second ventilation device 16; wherein, the reaction tank 11 is located between the first ventilation device 14 and the second ventilation device 16, the first ventilation device 14 is adjacent to the air inlet 101, and the second ventilation device 16 is adjacent to the air outlet 102, so as to effectively guide airflow into and out of the Fenton Air Purification System 1C.

[0086] Second, the top 110 of the reaction tank 11 is provided with a vent 113 and a switching mechanism 120, and the switching mechanism 120 includes a cover that can be movably opened or closed the vent 113. The Fenton air purification system 1C further includes an air supply device 17, and the air supply device 17 is connected to the reaction tank 11; wherein, one side wall of the reaction tank 11 protrudes to form a buffer space 114, the air outlet of the air supply device 17 is connected to the top 110 of the reaction tank 11, and the air outlet of the air supply device 17 faces the buffer space 114, so as to push the air containing hydroxyl radicals in the reaction tank 11 out through the vent 113, so as to effectively improve the efficiency of hydroxyl radicals in the reaction tank 11 being released into the air.

[0087] Third, the Fenton air purification system 1C further includes a cooling device 18, which is connected to the reaction tank 11 to stop the Fenton reaction by lowering the temperature of the hydrogen peroxide solution in the reaction tank 11.

[0088] Fourth, the iron reactant solid 2 is placed in the reaction tank 11; wherein, the iron reactant solid 2 (i.e., iron beads with a diameter of 2 cm) consists of 320 beads arranged in a single layer. The top surface of the iron reactant solid 2 is approximately 3 cm from the bottom surface of the reaction tank 11 and is below the surface of the hydrogen peroxide solution, and the surface height of the hydrogen peroxide solution is 10 cm. Therefore, the ratio of the surface height of the hydrogen peroxide solution to the average diameter of the iron reactant solid 2 is 1:0.2. Furthermore, the hydrogen peroxide solution comprises approximately 20 liters and includes water, hydrogen peroxide, and phosphoric acid. Based on the total volume of the hydrogen peroxide solution, the concentration of hydrogen peroxide is 30 w / v%, and the concentration of phosphoric acid is 0.1 w / v%. The Fenton air purification system 1C operates at room temperature.

[0089] Fifth, the first light source 12 is disposed inside the reaction tank 11, and the first light source 12 is housed in a transparent shell (not shown) to isolate hydroxyl radicals and volatilized hydrogen peroxide gas. The second light source 15 is disposed on the inner wall surface 103 of the shell 10, and the titanium dioxide coating 1030 is disposed on the inner wall surface 103 of the shell 10 and the outer peripheral wall surface 112 of the reaction tank 11 to remove hydrogen peroxide emitted from the reaction tank 11.

[0090] Example 2: Fenton Air Purification System 1D

[0091] As shown in Figure 7, the Fenton air purification system 1D firstly includes: a housing 10, a reaction tank 11, a first light source 12, a storage tank 13, and a first ventilation device 14; wherein, the housing 10 surrounds the reaction tank 11, the first light source 12, the storage tank 13, and the first ventilation device 14, and the housing 10 has an air inlet 101 and an air outlet 102, the air inlet 101 and the air outlet 102 are in gas communication with each other, and the first ventilation device 14 is adjacent to the air outlet 102.

[0092] Second, the top 110 of the reaction tank 11 is an opening, and the top 110 is further provided with a vent pipe 111, which extends around the opening and toward the first venting device 14; wherein, the wall of the vent pipe 111 includes a plurality of openings 1110, and the vent pipe 111 is divided into an upper half section and a lower half section that are adjacent to each other, and the upper half section is away from the opening of the reaction tank 11; wherein, the number of the plurality of openings 1110 in the upper half section (shown as 4 in the figure) is greater than the number of the plurality of openings 1110 in the lower half section (shown as 2 in the figure).

[0093] Third, a first liquid level sensor 116 is connected to the reaction tank 11 to sense a low liquid level in the reaction tank 11, wherein the low liquid level is the level at which hydrogen peroxide solution needs to be added; and a second liquid level sensor 117 is connected to the reaction tank 11 to sense a high liquid level in the reaction tank 11, wherein the high liquid level is the level at which hydrogen peroxide solution replenishment stops. The difference between the low liquid level and the high liquid level is 2 cm. The storage tank 13 is connected to the reaction tank 11, and the storage tank 13 contains a hydrogen peroxide solution to supply hydrogen peroxide solution to the reaction tank 11. In addition, the first light source 12 is located inside the reaction tank 11 and is above the high liquid level.

[0094] Fourth, a lifting device 118 is connected to a flat-bottomed mesh basket 119 and the reaction tank 11. The flat-bottomed mesh basket 119 is located in the reaction tank 11 and contains the iron reactant solid (not shown). The first light source 12 irradiates the iron reactant solid and provides ultraviolet C light. This invention, through the lifting device 118, can shorten the distance between the iron reactant solid and the first light source 12, thereby increasing the rate of the Fenton reaction.

[0095] Fifth, the space surrounded by the housing 10 has an airflow direction F, and the airflow direction F is in the opposite direction to the Earth's gravity. The air inlet 101 surrounds the storage tank 13, and the air outlet 102 is located at the top of the housing 10. An air filter cotton 19 is provided between the air inlet 101 and the storage tank 13 to prevent particulate dust from entering the space surrounded by the housing 10.

[0096] Sixth, the Fenton air purification system 1C operates at room temperature. The reaction tank 11 has a volume of 400 ml, the storage tank 13 has a volume of 2 liters, and the iron reactant solid consists of 214 iron beads, each weighing approximately 1 gram and having a diameter of approximately 0.6 cm. The reaction tank 11 in this embodiment has a limited capacity to restrict the reaction area and rate of the Fenton reaction, thus limiting the amount of hydrogen peroxide emitted, and no second light source or photocatalytic coating is provided.

[0097] Finally, as shown in Figure 8, the air inlets 101 are densely arranged near the bottom of the housing 10 to increase the air intake.

[0098] Example 3-1: Fenton Air Purification System 1E

[0099] As shown in Figure 9, the Fenton air purification system 1E of the present invention comprises: a housing 10, a reaction tank 11, a first light source 12, a storage tank (not shown), a first ventilation device 14, and a second ventilation device 16; wherein, the housing 10 surrounds the reaction tank 11, the first light source 12, the first ventilation device 14, and the second ventilation device 16, and the housing 10 has an air inlet 101 and an air outlet 102; the reaction tank 11 contains an iron reactant solid 2; the first light source 12 irradiates the iron reactant solid 2, and the first light source 12 provides ultraviolet light C; and the storage tank (not shown) is connected to the reaction tank 11, and the storage tank (not shown) contains a hydrogen peroxide solution to supply a hydrogen peroxide solution to the reaction tank 11; wherein, the storage tank (not shown) is located outside the housing 10 and is connected to the reaction tank 11 through a pipe (not shown) passing through the housing 10. In addition, the Fenton air purification system 1E may also be equipped with an air supply device (not shown) connected to the reaction tank 11.

[0100] Second, the reaction tank 11 comprises a plurality of reaction tanks 11, and each reaction tank 11 is arranged sequentially in layers along the direction of gravity, that is, the bottom of each reaction tank 11 extends horizontally, and the bottoms of each reaction tank 11 are spaced apart from each other vertically. Furthermore, each of the plurality of reaction tanks 11 is provided with the first light source 12. The first light source 12 is a light-emitting diode and provides ultraviolet C light with a wavelength of 254 nanometers. The housing 10 has an inner wall surface 103 and an outer wall surface 104 facing each other. The inner wall surface 103 faces the reaction tank 11, and the material of the inner wall surface 103 is sandblasted stainless steel with a titanium dioxide coating 1030. The first light source 12 also illuminates the titanium dioxide coating 1030, and a second light source (not shown) can be added to the inner wall surface 103.

[0101] Third, the iron reactant solid 2 consists of a plurality of iron beads, which are stacked in a flat-bottomed mesh basket 119 and then placed into the reaction tank 11, with the bottom of the flat-bottomed mesh basket 119 spaced apart from the bottom of the reaction tank 11. In addition, the flat-bottomed mesh basket 119 is suspended from the tank wall of the reaction tank 11.

[0102] Fourth, the space surrounded by the shell 10 has an airflow direction F, and the airflow direction F is perpendicular to the Earth's gravity.

[0103] Fifth, the reaction tank 11 is further connected to a heater (not shown), and the temperature of the heater is set to 60°C to increase the yield of hydroxyl radicals.

[0104] Sixth, connecting multiple Fenton air purification systems 1E in series can effectively increase the concentration of hydroxyl radicals, thereby significantly enhancing the ability to remove harmful substances such as volatile organic compounds.

[0105] Finally, Figure 10 is a top view. The reaction tank 11 is in the shape of a horizontal bed, with a length of 180 cm, a width of 150 cm, and a depth of 120 cm. Its volume is larger than that of Examples 1-1, 1-2, 1-3, and 2, thus significantly increasing the yield of hydroxyl radicals. In addition, two of the first light sources 12 are arranged above the single reaction tank 11.

[0106] Example 3-2: Fenton Air Purification System 1F

[0107] The difference between Example 3-1 and Example 3-2 is the number of flat-bottomed net baskets 119, as explained below: As shown in Figures 11 and 12, the plurality of reaction tanks 11 are arranged in layers along the direction of gravity, totaling 3 layers, and each reaction tank 11 contains a plurality of flat-bottomed net baskets 119, and the plurality of flat-bottomed net baskets 119 are arranged horizontally along the direction perpendicular to gravity, with 9 flat-bottomed net baskets 119 in a single layer.

[0108] Example 3-3: Fenton Air Purification System

[0109] As shown in Figure 13, the difference between Example 3-1 and Example 3-3 is that the Fenton air purification system in Example 3-3 further includes an exhaust channel 19, which is in gas communication with the second ventilation device (not shown); wherein, the exhaust channel 19 is provided with a titanium dioxide coating 1030 and a third light source 20, and the third light source 20 provides ultraviolet C light to irradiate the titanium dioxide coating 1030; wherein, the exhaust channel 19 is curved, which is beneficial to increase the length of the exhaust channel 19 in a limited space, so as to improve the removal efficiency of hydrogen peroxide gas.

[0110] Test Example 1: Detection of Hydroxyl Radicals

[0111] This test example uses an airtight system. First, 286 iron beads (each weighing about 1 gram and about 0.6 cm in diameter) and 200 mL of hydrogen peroxide solution (containing 50 w / v% hydrogen peroxide, 0.1 w / v% phosphoric acid, and the remainder being water) were placed in a 500 mL round-bottom reaction flask and heated to 60°C.

[0112] Second, 20 mL of distilled water (i.e., a DMPO solution) containing 10 mM of 5,5-dimethyl-1-pyrroline N-oxide (DMPO) is added to a 200 mL collection flask. DMPO is a known spin trap that can capture short-lived hydroxyl radicals (·OH) to form stable DMPO-OH adducts.

[0113] Third, the 500 mL round-bottom reaction flask is connected to the 200 mL collection bottle via a Teflon tube, and further connected to the 200 mL collection bottle via a small glass tube. One end of the small glass tube is connected to the Teflon tube, and the other end is immersed in the DMPO solution in the 200 mL collection bottle, thus forming the gas-tight system. Nitrogen gas is continuously introduced into the entire gas-tight system at a flow rate of approximately 2 mL / s, supplying the gas from the 500 mL round-bottom reaction flask to the 200 mL collection bottle containing the DMPO solution, thereby obtaining a test solution. 1 mL of the test solution is drawn every 10 minutes using a syringe for the following analysis.

[0114] X-band CW ESR measurements were performed at room temperature using an electron spin resonance (ESR) spectrometer equipped with a Bruker EMX micro-6 / 1 / S / L spectrometer featuring a Bruker E4119001 HS-W1 resonator and a Bruker high-sensitivity aqua x 94-well sample cell. The microwave power was 10 dB and the magnetic field modulation amplitude was 10 G.

[0115] As shown in Figure 14, no ESR spectral signal of the DMPO-OH adduct was detected in the test solution of the 0-minute group; only a flat curve in the middle, which is a background signal, was observed. In contrast, the test solutions of the 10-minute group and subsequent groups showed the characteristic 1:2:2:1 quartet ESR spectral signal of the DMPO-OH adduct (as shown in Figure 14), and its hyperfine splitting constant αN = 15.0 G and g = 2.0062.

[0116] In addition, the concentration change of DMPO-OH adduct was calculated using the Xepr software, as shown in Figure 15. As can be seen from Figure 15, since hydrogen peroxide solution was not continuously replenished, the spectral signal of DMPO-OH reached its peak at the 40-minute mark and then began to decline.

[0117] The results in Figure 14 clearly show that in the 500 mL round-bottom reaction flask, the hydroxyl radicals (·OH) generated by the Fenton reaction can be released into the gas phase and captured by the DMPO spin trap in the 200 mL round-bottom collector. Therefore, this test clearly demonstrates that the hydroxyl radicals generated by the Fenton reaction in solution can indeed be released into the air.

[0118] Test Example 2: Quantitative Analysis of Hydroxy Radicals

[0119] The spectral signal of TEMPOL was obtained by detecting the standard aqueous solution (containing 4-hydroxy-2,2,6,6-tetramethyl-1-oxypiperidine (4-Hydroxy-TEMPO, TEMPOL)) according to the DMPO-OH detection method shown in Test Example 1, as shown in Figure 16. Calibration curves were plotted using Xepr software with standard aqueous solutions of 0.0005 M, 0.001 M, 0.0015 M, 0.002 M, and 0.0025 M. After comparing the spectral signals of DMPO-OH over 40 minutes, it was found that the concentration of DMPO-OH in a 200 mL collection bottle at 40 minutes was 2.13 × 10⁻⁴ M. After conversion, the concentration of the gas released as hydroxyl radicals into the round-bottom reaction flask in this experiment was 2.3 × 10¹⁷ OH / m³ / sec. Finally, TEMPOL has the following advantages: (1) stable properties with low reactivity; (2) its electron spin resonance spectrum has been well resolved; and (3) its hyperfine splitting constant is known, so it was selected as a standard.

[0120] Finally, compared to the spectral signal waveform of DMPO-OH shown in the journal (Ching-San Lai and Lawrence H. Piette, Hydroxyl radical production involved in lipid peroxidation of rat liver microsomes, Biochemical and Biophysical Research Communications, Volume 78, Issue 1, 9 September 1977, Pages 51-59), the spectral signal waveform of DMPO-OH shown in Figure 14 of this case is wider. However, as can be seen from the fact that the spectral signal waveform of the standard TEMPOL shown in Figure 16 is also wider, this is only due to the different way the instrument presents the results.

[0121] Test Example 3: Formaldehyde Removal Test of Examples 1-3

[0122] The Fenton air purification system of Examples 1-3 was placed in a sealed room of approximately 16 square meters and 2.5 meters high at the Benyuanxing Factory in Taoyuan, and divided into a control group and an experimental group. The control group was not supplied with power to the Fenton air purification system 1C, that is, the first light source, the second light source, the first ventilation device, the second ventilation device, and the air supply device were not activated. The experimental group was supplied with power to the Fenton air purification system 1C.

[0123] Test method: After wearing protective clothing and a gas mask, the test personnel randomly sprayed 30 ml of formaldehyde in the sealed room using a sprayer and then left. A volatile organic compound detector (brand: Air Quality monitor, model: Ak3) was placed in the sealed room. The formaldehyde concentration displayed could be observed through the sealed window, and data was recorded every 10 minutes. The results are shown in Table 1.

[0124] Table 1: Formaldehyde removal test results of the control and experimental groups of the Fenton air purification system in Examples 1-3 (Unit: mg / m³) control group experimental group 10 minutes 0.192 0.195 20 minutes 0.186 0.161 30 minutes 0.181 0.129 40 minutes 0.168 0.114 50 minutes 0.158 0.104 60 minutes 0.152 0.097 average 0.173 0.133

[0125] As shown in Table 1, the formaldehyde concentration in the experimental groups gradually decreased; among them, the average formaldehyde concentration in the experimental groups within 60 minutes was only 0.133 / 0.173*100%=77% of that in the control group. This shows that the Fenton air purification system of Examples 1-3 after startup can indeed effectively remove formaldehyde in large spaces.

[0126] Test Example 4: TVOC and Formaldehyde Removal Test of Fenton Air Purification System in Example 2

[0127] The Fenton air purification system of Example 2 was placed in a sealed testing chamber with a volume of 480 liters, and divided into a control group and an experimental group. The control group contained only a sample of sprayed paint (red, Tillerson) (12 cm × 8 cm plasterboard), while the experimental group contained both the sprayed paint sample (red, Tillerson) (12 cm × 8 cm plasterboard) and the Fenton air purification system of Example 2. The TVOC and formaldehyde concentrations were measured using a volatile organic compound detector (brand: Air Quality monitor, model: Ak3), and data were recorded every 10 minutes. The results are shown in Table 2.

[0128] Table 2: TVOC and formaldehyde removal test results of the control and experimental groups of the Fenton air purification system in Example 2 (unit: mg / m3) control group experimental group TVOC formaldehyde TVOC formaldehyde 10 minutes 2 0.256 0.596 0.107 20 minutes 2 0.279 0.536 0.096 30 minutes 2 0.286 0.455 0.081 40 minutes 2 0.282 0.381 0.068 50 minutes 2 0.273 0.311 0.056 60 minutes 2 0.26 0.262 0.047 average value 2 0.27 0.42 0.08

[0129] As shown in Table 2, the experimental group significantly reduced the concentrations of TVOC and formaldehyde within 10 minutes. Specifically, the TVOC concentration in the experimental group was only 0.596 / 2*100%=29.8% of that in the control group, and the formaldehyde concentration was only 0.107 / 0.256*100%=41.8% of that in the control group. Furthermore, the average TVOC concentration in the experimental group within 60 minutes was only 0.42 / 2*100%=21% of that in the control group, and the average formaldehyde concentration within 60 minutes was only 0.08 / 0.27*100%=29.6% of that in the control group. This demonstrates that the Fenton air purification system in Example 2 can effectively remove TVOC and formaldehyde released from paint applied to plasterboard in small spaces.

[0130] In summary, the Fenton air purification system of this invention utilizes the Fenton reaction to generate hydroxyl radicals, and removes harmful substances such as volatile organic compounds from the air through the high oxidizing power of hydroxyl radicals.

[0131] 1A, 1B, 1C, 1D, 1E, 1F: Fenton Air Purification System 10: Shell 101: Air Inlet 102: Vent 103:Inner wall surface 1030: Titanium Dioxide Coating 104:Outer wall surface 105: Door 11: Reaction tank 110: Top 111: Ventilation tube 112: Peripheral wall 113: Vent 120: Switching mechanism 114: Buffer Space 116: First liquid level sensor 117: Second liquid level sensor 118: Lifting device 119: Flat-bottomed net basket 1110: Opening 12: First Light Source 13: Storage slot 14: First ventilation device 15: Second Light Source 16: Second ventilation device 17: Air supply device 18: Cooling device 19: Exhaust passage 20: Third Light Source 2: Iron reactant solid F: Airflow direction

[0132] none

Claims

1. A Fenton air purification system, comprising: a housing, a reaction tank, a first light source, a storage tank, and a first ventilation device; wherein, The housing surrounds the reaction tank, the first light source, and the first ventilation device; the housing has an inlet and an outlet, the inlet and the outlet being in gas communication with each other; the first ventilation device includes a fan and is adjacent to the inlet or the outlet; the reaction tank contains a solid iron reactant; the first light source irradiates the solid iron reactant and provides ultraviolet C light; The storage tank is connected to the reaction tank, and the storage tank contains a hydrogen peroxide solution to supply it to the reaction tank.

2. The Fenton air purification system as claimed in claim 1, wherein the iron reactant solid comprises iron beads or blocks after rust removal; the first light source is a light-emitting diode, and the wavelength of the ultraviolet C is 200 nanometers to 280 nanometers; and any or a combination of the housing, the reaction tank, and the storage tank is made of stainless steel or plastic.

3. The Fenton air purification system as claimed in claim 1, wherein the housing has an opposing inner wall surface and an outer wall surface, and the inner wall surface faces the reaction tank; and the reaction tank has an opposing inner tank wall surface and an outer peripheral wall surface; wherein, A photocatalytic coating is provided on either or a combination of the inner wall surface of the housing and the outer peripheral wall surface of the reaction tank, and a second light source is provided on either or a combination of the inner wall surface of the housing and the outer peripheral wall surface of the reaction tank, and the second light source provides ultraviolet light C; wherein, the material of the photocatalytic coating is selected from the group consisting of titanium dioxide, zinc oxide, tungsten trioxide, bismuth vanadate, graphitic carbonitride and cadmium sulfide; and the second light source is a light-emitting diode, and the wavelength of the ultraviolet light C of the second light source is 200 nanometers to 280 nanometers.

4. The Fenton air purification system as claimed in claim 1, further comprising a second ventilation device; wherein, The reaction tank is located between the first ventilation device and the second ventilation device, with the first ventilation device adjacent to the air inlet and the second ventilation device adjacent to the air outlet.

5. The Fenton air purification system as claimed in claim 1, further comprising an air supply device connected to the reaction tank; wherein, One side wall of the reaction tank protrudes outward to form a buffer space, the air outlet of the air supply device is connected to the top of the reaction tank, and the air outlet of the air supply device faces the buffer space.

6. The Fenton air purification system as claimed in claim 1, further comprising either or a combination of a cooling device and a heating device, wherein either or a combination of the cooling device and the heating device is connected to the reaction tank.

7. The Fenton air purification system as claimed in claim 1, wherein the top of the reaction tank is provided with a vent and a switching mechanism, and the switching mechanism is movably open or close the vent.

8. The Fenton air purification system as described in claim 4, further comprising an exhaust passage, wherein the exhaust passage is in gas communication with the second ventilation device; wherein, The exhaust channel is provided with a photocatalytic coating and a third light source. The third light source provides ultraviolet C light to irradiate the photocatalytic coating, and the exhaust channel is curved.

9. The Fenton air purification system as claimed in claim 1, wherein the housing is provided with a door, and either or a combination of the reaction tank and the storage tank is slidably connected to the housing; wherein, When the door is open, either or a combination of the reaction tank and the storage tank can pass through the door.

10. The Fenton air purification system as claimed in claim 1, wherein the concentration of the hydrogen peroxide solution in the storage tank is greater than the concentration of the hydrogen peroxide solution in the reaction tank.

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